Carbureter.



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.Application tiled September 27, 1916. Serial No. 122,513.

To all whom t may concern."

Be it known that I, CYRIL N. Ou'rnnnnmen, a citizen of the UnitedStates, residing at Charlottesville, in the county of Albemarle andState of Virginia, have invented new and useful Improvements inCarbureters, of which the following is a specification.

This invention relates to carbureters, the object in view being toprovide a earbureter which is especially designed for use in connectionwith a multiple cylinder engine, the carbureter embodying a Venturi tubehaving discharge branches diverging therefrom and constituting theintake manifold branches which lead to the engine cylinders, combinedwith a float controlled fuel supply, and a .novel arrangement ofthrottle valves and auxiliary air valves one of each of which isemployed in connection with each branch of the Venturi tube.

A further object in view is to provide in connection with the spraynozzle outlet of the fuel supply, an adjustable valve which togetherwith the spray nozzle is located in such relationto the Venturi tube andits branches asto cause a spreading'and diffusion of the carbureted airprior to the delivery thereof to the Venturi tube branches.

With the above and other objects in view, the invention consists in thenovel construction, combination and arrangement, herein fully described,illustrated and claimed.

The accompanying drawing represents a vertical diametrical sectionthrough. a carbureter embodying the present invention.

Referring to the drawings 1 designates a Venturi tube of the usualformation, having the upper and lower expanded end portions and thesubstantially central contracted portion 2 in which is arranged thespray nozzle 3 the discharge end of which is located at a comparativelyhigh elevation within the tube 1. The flared bottom end of the Venturitube 1 forms the main or primary air inlet.

At its upper end the Venturi tube is formed into two branches 4 whichdiverge upwardly on curvilinear lines and are provided with the usualflanges whereby conf nection is made between said branches 4 and thecylinders or intake manifold of the engine.

Each of the branches 4 contains an independent throttle valve 5 of thebutterfly type and is also formed with a tubular extension or auxiliaryair inlet connection (i containing an auxiliary air inlet valve 7 and avalve seating spring 8, the tension of the spring 8 being varied to suitconditions by adjusting means 9. e

Extending through the top wall 10 at the head'of the Venturi tube 1 is aregulating valve 11 shown in the form of a needle valve adapted tocoperate with the discharge end of the spray nozzle 3, said valve 11being provided with adjusting means 12 so that the quantity of fueladmitted to the carbureter may be regulated in accordance withatmospheric conditions and the type of engine in connection with whichthe carbureter is used. The valve 11 acts to spray or spread and diffusethe upwardly drawn fuel as it leaves the spray nozzle 3.

13 represents the fuel bowl of the carbureter which is shown assupported in relation to the Venturi tube 1 by means of a fuel feed pipe14. The cover 15 of the bowl 13 is removable, being detachably fastenedin place by means 16. A fuel. pipe 17 leads to the bowl of theearbureter and sediment, water or other vmaterial may be drainedtherefrom by means of the usual drain cock 18. The bowl 14 contains theusual float 19 which controls the fuel inlet valve 2O and maintains thefuel at a proper level within the bowl 13. @rdinarily the throttlevalves 5 will be connected. to the same coni-,rolling element so that anequal amount of carbureted air may be allowed lto pass through both ofthe Venturi branches 4.

A great advantage resides in employing two independentthrottle valvesand two independent auxiliary air inlet valves for the reason thatshould one block of cylinders become disabled, the throttle valvecontrolling said block of cylinders may be disconnected from the valveoperating means: and closed' so that no explosive mixture will reach thedisabled block of cylinders. This also effects a great saving ofgasolene. By having independent auxiliary air valves, they may beadjusted to suit the blocks of cylinders which they serve thus enablingbetter results to be obtained than where both blocks are supplied by asingle auxiliary air inlet valve. By arranging the needle valve to pointdownwardly, it does not have to be packed in order to prevent leakageof-gasolene around the stem thereof and the handle does not interferewith the inflow of the i ennnunn'rnn. f i i primary air; it isfurthermore accessible4 for adjustment. The air Valves are also easilyadjusted Without ,soiling the hands.

I claim:

l. In a oarbureter, a Venturi tube having a plurality of branchesleading from the disf charge end thereoi and constituting members of theintake manifold of an internal combustion engine, a fuel' spray lnozzledischarging Within said Venturi tube, an independent auxiliary air valveassociated With each branch from thev Venturi tube, and an independentthrottle Valve for each of said branches.

2. In acarbureter, the combination with a Venturi tube the lower end ofwhich forms a primary air inlet, of a fuel spray nozzle dischargingWithin said Venturi tube, a plurality of branches leading from thedischarge end of said tube and constituting members of the intakemanifold 0f an internal combustion engine, each of said branches beingprovided With a tubular extension having an independent auxiliary airinlet, an auxiliary air valve for each o said inlets, and independenttensioning' means for said auxiliary air valves.

In testimony whereof I aiiix my signature.

CYRIL NORTON OUTERBRIDGE.

Copies of this patent may be obtained'for ve cents each, by addressingthe Commissioner of latents,l

i Washington, D. C.

